RC ERA C138 Main Shaft Set — OEM Main/Center Shaft Assembly

Restore true, vibration-free rotation on your C138 with this genuine Main Shaft Set. Factory-straight shafts and matched hardware reduce wobble, improve blade tracking, and deliver smoother spool-up.

Key Features

• OEM-spec main/center shaft for accurate head geometry and smooth power transfer

• Cures head wobble, vibration, and off-tracking after bumps or hard landings

• Precision fit to minimize play at the hub and bearings

• Ideal for crash repair and routine drivetrain maintenance

Compatibility

Purpose-built for the C138 platform, fully compatible with:
👉 RC ERA C138 6CH RC Helicopter with Gyro & Optical-Flow Positioning (Red/Blue)

Not universal—recommended only for the C138 series.

What’s in the Pack

• 1 × Main Shaft (center shaft) for the C138 head/gear train

• Hardware as pictured (e.g., collar, screws, pins/retainers)

• Blade grips, feathering/spindle shaft, bearings, and main gear are not included unless shown in photos; reuse originals or purchase separately.

When to Replace

• Persistent vibration or head wobble after minor crashes

• Bent/ovalized shaft or visible runout

• Difficult blade tracking despite correct linkage lengths

• Scored shaft surface causing bearing wear

Installation & Setup Tips

• Power off & remove the battery before service

• Inspect and replace worn bearings, hub, or feathering shaft at the same time

• Ensure the collar/pin is seated correctly; check vertical play at the head

• Verify main gear mesh and that the shaft spins freely without binding

• After assembly, level the swash and do a low-hover tracking check

More C138 Spare Parts

Need rotor head, swashplate, linkage rods, bearings, gears, or blades?
👉 Explore the collection: C138 Spare Parts Collection